Q. The total number of $\alpha$ and $\beta$ï€ particles emitted in the nuclear reaction $_{92}^{238} \mathrm{U} \rightarrow_{82}^{214} \mathrm{Pb}$ is
[JEE 2009]
Q. The number of neutrons emitted when $_{92}^{235} \mathrm{U}$ undergoes controlled nuclear fission to $_{54}^{142} \mathrm{Xe}$ and 
is –
[JEE 2010]
is –
[JEE 2010]
Q. Bombardment of aluminium by $\alpha$ -particle leads to its artificial disintegration in two ways,
(i) and (ii) as shown. Products X, Y and Z respectively are :
(A) proton, neutron, positron
(B) neutron, positron, proton
(C) proton, positron, neutron
(D) positron, proton, neutron
[JEE 2011]
(A) proton, neutron, positron
(B) neutron, positron, proton
(C) proton, positron, neutron
(D) positron, proton, neutron
[JEE 2011]
Q. The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons, undergoes a nuclear reaction yielding element X as shown below. To which group , element X belongs in the periodic table ?
[JEE 2012]
Q. In the nuclear transmutation
(X, Y) is(are)
$(\mathrm{A})(\gamma, \mathrm{n})$
(B) (p, D)
(C) (n, D)
$(\mathrm{D})(\gamma, \mathrm{D})$
[JEE 2013]
(X, Y) is(are)
$(\mathrm{A})(\gamma, \mathrm{n})$
(B) (p, D)
(C) (n, D)
$(\mathrm{D})(\gamma, \mathrm{D})$
[JEE 2013]
Q. A closed vessel with rigid walls contains 1 mol of 238
92 $\mathrm{U}$ U and 1 mol of air at 298 K. Considering complete decay of $^{238}_{92} \mathrm{U}$ the ratio of the final pressure to the initial pressure of the system at 298 K is –
[JEE 2015]
